Windshield wiper



msg-jfs Feb. 14,1928.

s. H. SHAW ET AL WINDSHIELD WIPER 'Filed Sept. 8, 1924 f@ MM Je@ "Patented Feb. 14 1928.v

1,659,219 rAiiaNi ortica.-

- "UNITED s'rATEs SAMUEL n. SHAW Ann JAMES T. s iBLEY, or NEW venir,I n. Y.

wmnsHinLn yWiriiii.

Application led September 8. i924. Seriall No. 736,472.

'lhe object of our invention is to provide a windshield wiper of a character which Awill give a clear vision for the full width of an automobile windshield. ntheordi- 5 nary construction of a windshield wipervthe mechanism consists usually oi' a motor having means for oscillating the wiper. blade back and orthfthrough the arc of a circle.

the center of whichis iii the near vicinity ol the upper edge of the frame ofthe win-dshield itself, and. only a comparatively small portion of the cleaned area comes within the range orline of vision leaving the remainder of the win dshield coated with a hlm of moisl ture or snow and thereby obscuring the vi- Asion of a person who may be sitting at the rear of the Windshield. Another defect inherent inthe common method of applying the windshield cleaner resides inthe fact 20 thatsince the center of the oscillating wiper is located at the upper edge of the windshield and sweeps-back and Jforth over its' outenface, it necessarily carries the Water or snow to theupper vedge-ot the shield at each stroke and upon the reversalo the stroke leaves it there to drip in streaiiilets over the line division. These defects in the usual construction and voperation of the windshield are overcome in our improved 30 device,I irst byL attaching the Wiper to the lower ed e oi'' the windshield, locating vthe motor a jacent-to the corner of the frame.r

' and then locating va pair of wipers with their v centers of oscillation substantially at the lower edge of the frame with means for os# cillating said wipers back and forth connect.- ed directly to the'motor. ln this manner we are able .teclear substantially the entire efiectivearea or' the windshield and thereby so adord clear'vision both for the driver oi the car and for the passenger seated at his side. ln carrying out our invention we make use oi the structure substantially as illustrated in the accompanying drawing wherein-v llig. l is a general view of the rear or Vinsidefface oitl a windshield showing the lo- A cation of the motorat the lower righthand corner of the same and a ypair of wipers connected in tandem 'to be operated thereby.

lFig. 2 is an end elevation of the same.

liig. 3 is a section on line lll-III of vliig. 1. A Y

llig. 4 is a -section on line llV--IV of Fighl. f w j v Fig. 5 is a fragmentaryplan of the structure showing the location yand-relative po- 'of the device to the curved windshield."

no. further description here.

' the lower 'edge of 'the windshieldglass and .is secured thereto as above described. They sition ot the wiper mechanism with `respect to the windshield glassl Fig. 6 is an end view partly in section'on line Vlr-VI of Fig. vi, showing the motor co l* connection with the wiper racks.

Fig. 7 'is a gear plan of the connection. ,i liig. 81S a view showing the application F ig. 9 is a detail. r o5 Similar reference numerals refer to like parts throughout the specication and .draw-` ing. v

The swinging vWindshield l is of any usual or preferred type the same being piv- 70 oted in abody franre (not shown) by means of trunnions 2, and isniade up of the inetallic frame 3 andthe glass 4:.'\ LThe lowers edge ofthe glass is left free and as usually constructed is designed to engage a rubber hatten 5 which is secured to the lower sec tion 03E-the windshield.

'Qur improved shield wiper is secured to the lower `edge and right end portion of the trame of the windshield`. lt consists of a niotor 6, which if desir/ed may be of the type illustrated in the application of J ames T.

sibiey senn. 725,617, inea .iuiyia 192i,

the operating feature of which consists of a rotating pinion 7, having means or rotating the same irstin one directionand then` in the other. 'lhis pinion is actuated by mechanism upon theinterior `oi? the motor 1 in. substantially the same manner as described in aforesaid application and needs Any motor which is capable of producing a reciproc tling motion may be'- readily adapted to acf coinplish Vthe results sought for in our invention. ln the presentI case the pinion `7 meshes with a. segmental rack 8 pivoted upon the windshield atx9 and havinga depending arm lO to the extremity .of which is coupled a-reciprocating rack bar ll" which is guided ina channel 12, said channel being secured to the .lower edge ofthe sliield'- glass 4. Themeans for securing said channelto the glass consists ofa series of set screws 13passing through a *flange of the channel l2 and clamping against strips of rubber 14.' lThis 15 channel is of substantially S shape in cross section -withthe reciprocating b arfll enclosed in one sectionof the channel while the othergsecti'on' 'of the channel embraces channel 12 is of a length s uliicient to extend oov indicated.

completely across the lower edge of the windshield. At suitable intervals in this ,channel offset recesses 15 are provided which serve as housings for' the small pinions 1G mounted yupon the shafts 17 and journaled in the bearings 18 as clearly shown in F ig. 3. The inner end of the bar 11 is provided with a slot 19-through which the pin 20 is inserted and secured in the flanges of the channel 12. The adjacent end of the bar 11 is provided with rack teeth 21 to engage the teeth ot' the pinion 16. Upon the outer end of the shaft 17 the wiper arm 22 is se cured as by means of a set screw 23.

F rom this structure it will be noted that as the motor drives the pinion 7 first in one direction andthen in the other the segmental gear 8 is given an oscillating motion which is converted into a reciprocating motion of the bar 11 thereby swinging the wiper arm 22 and its wiper 24 in the are ot' a circle as Connected to the end of the reciprocating bar 11 by any convenient means of coupling is la second reciprocating bar 25 provided with a slot 2U `through which a pin 27 is inserted to guide the same in the channel 12.` The bar is provided with rack teeth 28 similar in all respects to the rack teeth 21 and they engage a. pinion 29 and drive a second wiperarm 30 the parts being substantially the saine in all respects as those above described. It will b obvious when the motor 6 is set into operation that the rack 8 will be oseillated, thereby oscillating arm 10 and the arm 10 will reciprocate the bar 11. The bar 25 being coupled to the bar 11 will likewise be reciprocated and the bars 11- and 25`will oscillate the pinions 16 and 29. The oscillation of these pinions will oscillate the shafts connected therewith which support or carry the wiper arms. As shown the cleaned areas etliected by the two wipers 24 and 30 overlap each other so that substantially the entire wind shield is cleaned and the act ot cleaning or wiping carries the snow or moisture to the lower edge ot' the windshield where it may drip oif without again interfering with the line of vision.

In some automobiles the lower edge of the Windshield is constructed on a'curve to conform with the shape or dash as illustrated in Fig. 8. In such'case the vchannel 12 corresponding with the channel 12 above described, is given the same curve as are also the rack bars ll and 25', all other parts of the structure remaining the Same as heretofore described.

From the foregoing, it will be seen that we have designed a form of windshield wiper whereby substantially thc entire efiective surface ol? the windshield may be cleared of snow or moisture and at the same time the tendency i'or such moisture to drip down over the cleared section is avoided.

Any ot' the usual forms of motors for reciprocating the rack bars 11 and 25 may be used and we tind that the motor described in the above named application of James T. Sibley is very etl'ective for the purpose of our improvement, we therefore do not claim specilically a form of motor but confine our claims,4 to the structure otf the duplex wiper and the immediate mechanism in connection therewith for operating the same.

We claim 1. In a windshield wiper, a channel bar S- shaped in cross-section, one of the channels of which embraces and is clamped to the lower edge otl a windshield, a reciprocating rack bar guided in the other channel ot' said bar, a pinion engaging said rack bar, a wiper arm and wiper connected to said pinion, and av motor connected to said rack bar i'or reciprocating the same and to thereb oseillate said wiper over the face of sait wind shield.

2. In a windshield wiper, a motor adapted to be attached to a windshield near one corner thereof, a channel bar having a plurality ot channels, one. adapted to embrace an edge of the windshield, a reciprocating rack bar guided in the second channel of said bar, a windshield wiping element actuated by the rack bar, and a gear connection between the rack bar and the motor for reciprocating the. rack bar.

SAMUEL H. SHAIV. JAMES T. SIBLEY. 

